21.10.2009 – The endgame Carlsen-Wang Yue, which was presented last week by GM Karsten Mueller for ChessBase Magazine Online, in one variation ended in the diagrammed position with two knights against two pawns. This position is won for the knights' side although, as is well known, two knights alone can't force checkmate. Pivotal for victory is on which square a remaining pawn has to be blocked, determining the so-called Troitzky line. Since this has led to many requests, Karsten Mueller will explain the subject once more in detail in the following.
Position after 65.Nf4!
